Subject
Historic buildings
136
Cathedrals
124
Churches
65
Streets
62
Rivers
39
Bridges
34
Monuments & memorials
27
Universities and colleges
25
Piers & wharves
22
Dwellings
16
Waterfalls
16
Presbyterian churches
14
Harbors
13
Ships
11
City & town halls
10
Forts & fortifications
10
Parks
10
Castles & palaces
9
Hotels
9
Courthouses
8
Steamboats
5
Towers
5
Barracks
4
Catholic churches
4
Roads
4
Walkways
4
Hospitals
3
Lakes & ponds
3
Schools
3
Architecture
2
Cemeteries
2
City walls
2
Electric railroads
2
Islands
2
Plazas
2
Post offices
2
Prisons
2
Tombs & sepulchral monuments
2
Abbeys
1
Boats
1
Cliffs
1
Estates
1
Golf
1
Libraries
1
Markets
1
Railroad bridges
1
Railroads
1
Wetlands
1